Flushable nozzle



Jan. 23, 1951 E. c. HORTON FLUSHABLE NOZZLE Filed March 1, 1947 INVENTORErw/h C. Harm/ BY Q M MVQMM.

ATTORNEY5 Patented Jan. 23, 1951 $9 a vwe c n system and 511particularly-to an apparatus for washing thewindshield clean of visionobscuring matter whereby to maintain a clear field of vision through the:shield.{in arrangement of this 1 general class is now in use on themodern car, the same employing a small nozzle with a fine orificethrough which the washing liquid is discharged onto the windshield. .Inpractice" this discharge orificeis quite small and therefore it-- willsometimes become clogged by impurities in the water as supplied byservice station attendants.

The object of the present invention is to provide an arrangement of thischaracter by which flow obscuring impurities may be readily flushed fromthe system. Again, the invention has for its object to provide adischarge unit of simple and economical design which will facilitate themass production of the same.

The foregoing and other objects will manifest themselves as thefollowing description progresses, reference being had to theaccompanying drawing, wherein Fig. 1 is a schematic view illustrating awindow washing system embodyin the present invention;

Fig. 2 is a fragmentary and greatly enlar ed view showing the dischargeunit partily in section; and

Fig. 3 is a transverse section taken on line 3-3 of Fig. 2.

Referring more particularly to the drawing, the numeral I designates thewindshield over which a wiper 2 is oscillated with anarm 3 by means of ashaft journaled in a cowl supported housing 4. These parts are ofwell-known construction since they form a part of the standard equipmentof the modern automobile.

The shaft housing 4 is provided with a liquid discharging unit 5 whichin turn is connected by a conduit 6 to a pump I. The pump may be of anyapproved form, such as that shown in the earlier Patent No. 2,142,056,and therefore may comprise a diaphragm 8 normally held at the end of itsdischarging stroke by a sprin 9. A pump is mounted on a liquid reservoirI 0 and has its diaphragm chamber connected by a conduit II to thejntakemanifold I2, or some other suitable source of negative pressure. I3arranged in the conduit II is operable to connect the pump to its sourceof vacuum so as to actuate @the liquid displacing member 8 against y ofspring 9 for intaking a charge of the reservoir I0. Upon'jreleese ofliquid A control valve UNITED-STATES PATENT OFFICE:

CnHorton, Hamburg," l T.- Y.,assignm'v to Trico ProductsCorporatiomBufiaIo, N. Y.

" f Applicaticn 1, 194 7; semi-N 731,773

' iaciarms. (org es-e59). H

fthe valve- Id'the diaphragm chamber containing apassage 6' extendingbetween the throat I5 of the nozzle body and the conduit 6. The throatI5 opens into a chamber I6 from which the liquid will pass into acounterbored chamber I1 and out through an orifice I 8 which ispositioned to direct a spray upwardly onto the windshield. The chamberI6 is internally threaded to receive a flushing valve l9. This valve isarranged to seat upon the rim 2!] in which the orifice I8 is cutso thatwhen the valve is opened the orifice I8 will likewise be opened throughthe rim. A sealing gasket 2I may be interposed between the valve I9 andits seat as provided by the rim 20. The valve is formed with ananchoring stem or shank 22 externally threaded to adjustably engage theinternal thread 23 in the chamber I6. The stem is straddle-milled toprovide opposite flat faces 24 which serve, with the encircling chamberwall, to define fluid passages 25 as a means of communication betweenthe inner end of the chamber I6 and the counterbored chamber I1. Byreason of the position of the mountin shank in the nozzle body, thiscounterbored chamber is made ring shaped and therefore the jet orifice I8 will have free communication about the shank and through the parallelpassages 25 with the chamber I6.

In actual practice the entire length of the nozzle is approximatelyone-half of an inch and the diameter, is about one-fourth of an inch. Itis therefore obvious that the discharge orifice will be quite minute inorder to conserve the supply of liquid and to insure the issuing jetcarrying upwardly into the path of the wiper 2, as indicated in Fig. 1.Consequently, the orifice may readily 'clog by impurities in the liquid.Howac ion will be; of limited duration since the pum grnt ill expel thepredetermined vqllmlejf'. a predetermined pressur mafia 3 after thevalve will be reset for the subsequent functioning of the system.

The invention is of simple construction and the parts are economicallymanufactured and assembled. In practice it has been found to beefiicient and practical, and while the foregoing description has beengiven in detail for ease of understanding it will become apparent thatthe inventive principles involved are capable of assuming otherembodiments without departing from the spirit of the invention and thescope of the appended claims.

What is claimed is:

11A nozzle comprising a tubular internally threaded body having alaterally spaced annular chamber at its outer end, the lateral wall ofthe chamber being defined by a rim, a flushing valve normally seating onsaid rim to close the chamber therethrough and having a reduced mountingshank; said mounting shank bein spaced inwa'r'dly' of ';the rim anddefining "the inner wall of the annular chamber and including a threadedportion for engagement with the internally threaded portion of said bodyto permit unseating of the valve from the rim, the latter being formedwith a recess interrupting its surface and overhung by the 'sea'tedvalve"to define with the valve ;a "lateral discharge orifice, said shankhaving a flat face at one side for establishing communication throu hthe body to the chamber, and said 39 chamber with the shank defining anannular passage establishing communication between the flat face and thedischarge orifice.

2. The structure of claim 1 characterized in that a sealing gasket isinterposed between the valve and rim, and one face of the sealing gasketdefines the outer wall of the channel.

ERW IN C. .I-IORTON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Great Britain Oct. 14, .1921

